JUST ADD CHICKEN: More than a thousand...

JUST ADD CHICKEN: More than a thousand people have gone to Knott’s Berry Farm free on their birthday in its recent promotion, bringing their friends. But a tiny hitch: They were eating at a nearby Denny’s, which was giving free birthday meals. Now Knott’s has boosted its freebie: a free birthday ticket and a free chicken dinner. . . . “We wanted to make it a better offer,” Knott’s spokesman Stuart Zanville says.